Ore-pulverizer.



A.-|VIOLANDER.

ORE PULVERIZEH.

APPLICATION FMD-MAR. 13, 1916.

flammea Man 27, 1917.

LFRED. MZ ANOL'R.

W/TN/SSES Ms ALFRED MOLANDER, OF MINNEAPOLIS, MINNESOTA.

ORE-PULVERIZER.

Specification of Letters Patent. *Y Patented Mali'. 27, V1917.

Application filed March 13, 1916. Serial No. 88,942.

To all whom t may concern:

Be it known that i', ALFRED MOLANDER, of the city of Minneapolis, in the State of Minnesota, United States of America, have invented certain new and useful Improvements in Ore-Pulverizers, of which the following is the specification. i

My invention relates to `improvements in ore pulverizers and the object of the invention is to devise ya simple form of pulverizer which will rapidly and eEectually crush ore to any degree of iineness and yet will allow the passage of foreign matter between the crushing members which is too hard to be n crushed thereby without damaging the crushing members and in which the wear on inclined toward the top to an eccentric position, the bottom face of the member being inclined upwardly from the side of the cone having the smallest radius atthe top toward the side of the cone having the greatest ra? dius, resilient means for supporting the shaft in bearings, means for adjusting the shaft vertically and means for driving the shaft las hereinafter more particularly explained by the following specification. Y

Figure 1, is a sectional view of my ore pulverizer.

Fig. 2, is a sectional plan view taken on line -fz/ Fig. 1.

line m-y Fig. 1.

In the drawings like letters of referencel 'indicate corresponding parts in each figure.

1 indicatesthe base upon which. is supported an inverted conical casing 2 having an open lower end 3 and an open upper end 4 provided with a hopper-like upward extension 5 into which the ore is fed. 6 indicates standards forming a central vertical bearing 7 located over the centerof the casing 2. 8 indicates a slidable bearing block provided with a central step bearing 9 and radially extending arms 10 and 11 slidably fitting at their ends in vertical guides l2 formed in the main base 1. 13 indicates a stationary wedge block formed integral with the main base 1. 14; indicates a slidable wedge block provided with an inclined lower face and a horizontal upper face, the inclined lower face of the wedge block la bearing upon the inclined upper face of the wedge block 13. 15 indicates an adjusting screw held within an internally threaded orifice 16 of the baseand turnably held in the outer end of the wedge block 14 by suitable means, such as a set screw 17 engaging an annular groove 18 in the screw. 19 indicates a recess formed in the upper end of the step bearing 9. 2O indicates a vertical shaft journaled at its lower end in the step bearing 9 and extending toward its upper end through the vertical bearing 7. The bearing 7 is also provided with a recess 7". 21 indicates a spiral spring fitting in the recess 7X and 22 indicates a spiral spring fitting within the recess 19. 23 indicates a pulley threadedon to the upper end of the shaft 20. 24 indicates a ball bearing inserted between the pulley 23 and spring 21.

It will be noticed that the vertical shaft 20 is mounted concentrically with the center of the casing 3. The casing 3 is provided with a lining 24X preferably formed of manganese steel and corrugated vertically from the top or small end of the conical casing down toward the bottom. such corrugations gradually merging into the circular contour of the inner face of the casing 3.

25 indicates a conical crushing member. Y

The member 25 is provided with an inclined bottom face 26 andthe center of the cone is inclined upwardly and outwardlyfrom the center of the casing Aso that the top of the cone is slightly eccentric to the center of the shaft and casing as clearly indicated in Fig. 3, is a sectional planview taken on Fig. 2. By this construction the outer edge of the inclined bottomf26 of the conicaly member extends parallelly with the oppos ing portionof the inner face ofthe casing 3.

27 indicates a covering for the conical member 25 also formed of manganese steel,

from the interior face ofthe casing and the ratchet-shaped portion 28 is closer to the ratchet-shaped tooth portion28,X is 'farther 1110 interior face of the casing with the exception of the lower edge 282 of the cone itself which almost touches the interior face of the casing, and will, therefore, only allow very finely pulverized material to pass therethrough. The interior of the conical inember 25 is preferably hollow except at the upper or narrow portion in which is formed a bearing orifice 25X through which the shaft 20 extends and at the bottom is provided with a central hub 25 and arms 252 extending radially therefrom to the interior face of the member.

In order to keep the central member 25 cool the wall thereof is chambered out at 29. 30 indicates a. duct which passes through. the radial arm 8 and to the outer end of which is connected a compression air supply pipe. The opposite end of the duct 30 is provided with a vertical vportion 31. 32 indicates a duct extending vertically upwardly through the center of the shaft 2O and is provided at its upper end with an angular extension 33. 3l indicates duct extending through one of the arms 25 and registering at one end with the open'end .of the duct extension 33 and opening at the opposite end into the chamber portion 29. Air passes through such chamber portions and is exhausted through a duct 35 extending radially inwardly and registering with a similar duct 36 formed in the shaft 20 provided with an upwardly inclined extension 37 leading to the atmosphere. The casing 3 is also similarly chambered out at 38 and provided with a suitable source of supply and exhaust for the compressed air.

Having described the principal parts involved in my invention I will briefly describe the operation of the same.

Ore is fed into the hopper 5 and passes into the space between the interior vertically corrugated face of the conical casing 3 and the exterior face of the cone 26. As the shaft 2O and conical member 26 secured thereto is revolved the eccentric portion of the upper end of the conical member engages with the rock gradually crushing it. The crushed rock passes downwardly through an opening formed between the apex of the ratchet 28X and the interior face of the casing and is again crushed until it is small enough to pass between the apex of the next tooth in downward succession and the interior of the casing. This process is repeated until the ore is crushed line enough'to pass between the small opening Vformed between the lower end of the crushing member 28 and the interior face of the casing. If any foreign matter should pass into the pulverizer with the ore such as cannot be crushed by the pulverizer the springs 21 and 22 will allow the crushing member to give and allow the passage of such foreign matter.

If the crushing members wear all that it is necessary to do is to adjust the wedge block 14 by means of the screw 16 so as to raise the member 26 into closer contact with the interior face of the casing 3. When this is done, of course, the pulley 23 and bearing 211 is threaded downwardly into close contact with the spring 21. If it is desired to regulate the ineness to which the ore is crushed this may be done by raising or lowering the crushing member so as to increase or de crease the size of the opening between the lower end of the conical member 26 and the interior of the casing 3.

From this description it will be seen that I have devised a very simple form of pulverizer which will crush ore to any degree desired and which will perform such operation rapidly and eihciently and yet will allow the free passage of any foreign uncrushable mat` ter which may pass accidentally into the pulverizer with the ore and in which the wear may be easily and readily taken up whenever desired.

It will be noted that as the crushing member 25 revolves all the material contained in the space formed by the left hand side of casing 2 and the opposing portion of the crushing member is ground out of that space as that portion of the crushing member passes to the right hand side of the casing by reason of the inclined set of the bottom of the member and the ratchet teeth so that the whole contents of such space is fed downwardly during this turning movement.

What I claim as my invention is:

1. An ore pulverizer comprising an outer inverted conical casing having an open upper and lower end, a vertical shaft journaled in suitable bearings and extending concentrically through the casing and a conical crushing member eccentrically secured to the shaft and having the face of the lower end inclined from one side of the member to the other so that its edge lits freely within the casing by extending parallel with the interior face of the wall of the casing and in close proximity thereto.

2. An ore pulverizer comprising an outer inverted conical casing having an open upper and lower end7 a vertical shaft journaled in suitable bearings and extending concentrically through the casing, and a conical crushing member secured to the shaft and having its lower face inclined upwardly from the side of the crushing member having the smaller radius whereby a space is formed by the wall of the crushing member and the casing terminating at its lower end in an acute angle.

3. An ore pulverizer comprising an outer inverted conical casing having an open upper and lower end, a vertical shaft journaled in suitable bearings and extending concentrically through the casing and a conical crushing member eccentrically secured to the shaft and having the face of the lower end inclined from one side of the member to the other and fitting freely within the casing by extending parallel with .the interior face of the wall of the casing, and means for automatically relieving the pressure on the conical member during the feeding out of the crushed material.

4. An ore pulverizer comprising an outer casing, a vertical shaft, an upper and lower bearing therefor, a crushing member mounted on said shaft, said member including a hollow crushing body portion, and radial arms supporting the base of said portion, and registering ducts in said lower bearing, shaft and arms whereby cooling iiuid may be supplied to the interior of said body portion.

5. An ore pulverizer comprising an outer casing, a vertical shaft, an upper and lower bearing therefor, a crushing member' mounted on said shaft, said member including a hollow crushing body portion, registering i ducts in said lower bearing, shaft and arms whereby cooling fluid may be supplied to the interior of said body portion, and registering ducts in said upper bearing and shaft for conveying said fluid away.

6. An ore pulverizer comprising an outer inverted conical casing having an open upper and lower end, a step bearing located below, the casing concentrically thereof, a vertical bearing located above the step bearing in vertical alinement therewith, a shaft journaled in the step bearing and Vertical bearing, a conical crushing member carried by the shaft and co-acting with the conical casing, a spiral spring carried by the step bearing on which the crushing member rests, and means for adjusting the step. bearing vertically including a wedging element.

7 An ore pulverizer comprising an outer inverted and j acketed conical casing, a vertical shaft journaled in suitable bearings and extending centrally through the casing, a conical crushing member mounted`thereon and co-acting with the casing, and means for forcing compressed air under pressure through said bearings and shaft into the interior' of the jacket of the casing.

8. An ore pulverizer comprising an outer inverted conical casing having an open upper end, a vertical shaft journaled in suitable bearings and extending concentrically through the casing and a conical crushing member eccentrically secured to the shaft and having the face of the lower end inclined from one side of the member to the other, an annular recess formed in and surrounding the periphery of the crushing member parallel with the inclined bottom thereof and forming with the inner face of the casing a triangular pocket having the apex forming the discharge at the bottom and a mouth at the top, and means for automatically relieving the pressure on the conical member during the feeding out of the crushed material froml the pocket.

ALFRED MOLANDER.

Witnesses M. EGAN, V. LONG.

Copies of this patent may be obtained for five cents. each, by addressing the Commissioner of Patents. Washington, D. C. 

